<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="./node_modules/bootstrap/dist/css/bootstrap.css">
    <script src="./node_modules/jquery/dist/jquery.js"></script>
    <script src="./node_modules/bootstrap/dist/js/bootstrap.js"></script>
    <script src="./node_modules/bootstrap/js/collapse.js"></script>
    <title>Title</title>
</head>

<body>
    <div class="jumbotron">
        <a href="./node_modules/jquery-ui/demos/accordion/index.html">
            <h1>测试下拉菜单可以这么做</h1>
        </a>
    </div>
</body>

</html>